Sign support



FIG. 1 is a front view of the sign support showing my design, the vehicle shown in broken lines is for illustrative purposes only and forms no part of the claimed design.

FIG. 2 is an enlarged, fragmentary view of the top section of the sign support as shown in FIG. 1;

FIG. 3 is an enlarged, fragmentary view of the mid section of the sign support as shown in FIG. 1; and,

FIG. 4 is a top plan view of the sign support as shown in FIG. 1 thereof.

The broken lines are shown for illustrative purposes only and form no part of the claimed design.

The sign support is being fragmentarily shown for convenience of illustration. 

The ornamental design for a sign support, as shown and described. 